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adisas1976, Author at RK Watch Service https://rkwatchservice.com/author/adisas1976/ Watch Repair & Restoration Service Tue, 10 Jun 2025 14:41:28 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://rkwatchservice.com/wp-content/uploads/2024/03/cropped-RK-Watch-Service-Logo-Chicago-Watch-Repair-Web-32x32.png adisas1976, Author at RK Watch Service https://rkwatchservice.com/author/adisas1976/ 32 32 Valjoux 7750 17 jewels balance isue https://rkwatchservice.com/valjoux-7750-17-jewels-balance-isue/ Sun, 11 May 2025 08:04:59 +0000 https://www.watchuseek.com/threads/valjoux-7750-17-jewels-balance-isue.5625093/ Watch Repair & Restoration Services in Northbrook & North Chicago Suburbs. Contact us for a free estimate at 224-213-7371. Learn more from our news blog.
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adisas1976

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adisas1976

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Hello everyone.
I have a Valjoux 7750 movement with 17 jewels. As far as I know, the difference between the 17 jewels and the 25 jewels, among other things (but not very much, I think), is the oscillation frequency: 21600 for the 17 jewels movement and 28800 for the 25 jewels movement.
Correct?
If that is correct, I assume that the balance with the balance spring is different. In this case, can you tell me if the reference code for the balance in the 17 jewels version is 721N? Or another…

Valjoux 7750 17 jewels balance isue

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